Automated optical link power control

H - Electricity – 04 – B

Patent

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Details

H04B 10/17 (2006.01)

Patent

CA 2612422

A system, apparatus and method are described for controlling the gain across one or more amplifier nodes within an optical span. In one embodiment, a fast local amplifier constant gain control loop is provided that maintains a constant gain across an amplifier node for each of the channels within an optical signal. A slow link level gain setting control loop is provided to set and/or adjust the target gain on the amplifier node(s). A gain adjust sequence is performed by the slow link level gain setting control loop to adjust the target gain(s) in response to various events and mechanisms. A "time of flight" protection method is also provided to ensure consistency between the fast local amplifier gain control loop and the slow link level gain setting control loop.

La présente invention se rapporte un système, à un appareil et à un procédé permettant de commander le gain aux bornes d'un ou plusieurs noeuds amplificateurs dans une portée optique. Dans un mode de réalisation, une boucle de commande de gain constant d'amplificateur local rapide maintient un gain constant aux bornes de noeuds amplificateurs pour chacun des canaux contenus dans un signal optique. Une boucle de commande de définition de gain de niveau liaison lente est destinée à définir et/ou régler le gain cible sur le ou les noeuds amplificateurs. Une séquence d'ajustement de gain est exécutée par la boucle de commande de définition de gain de niveau liaison lente afin d'ajuster le ou les gains cibles en réponse à divers événements et mécanismes. L'invention concerne également un procédé de protection du "temps de vol", destiné à garantir la cohérence entre la boucle de commande de gain constant d'amplificateur local rapide et la boucle de commande de définition de gain de niveau liaison lente.

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